Bed-plate for steam-engines



(No Model.)

M. HASTINGS. BED PLATE FOR STEAM ENGINES.

No. 409,198. Patented Aug. 20, 1889.

Wag/220 UNITED STATES PATENT OEEIGE.

MICHAEL HASTINGS, OF BROOKLYN, NEIV YORK, ASSIGNOR TO THOMAS IV. IVILLIAMS AND CHARLES A. IVILLIAMS, OF NEV LONDON, CONNECTICUT.

BED-PLATE FOR STEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 409,198, dated August 20, 1889.

Application filed March 9, 1889. Serial No. 302,598. (No model.)

To @ZZ 1071,07'1'1, it may concern.-

Be it known that I, MICHAEL IIAs'rINGs, a citizen of the United States, residing in Brooklyn, Kings county, and State of New York, have invented certain new and useful Improvements in Bed-Plates for Steam-Engines, of which the following is a specication, reference being had to the accompanying draw ings.

My invention relates specially to bed-plates for two-cylinder engines in which the eX- haust-passages of the two cylinders connect with special passages in the bed-plate, which themselves come together and form a single exhaust-outlet for both.

In ordinary practice the admission or exhaust passages being formed within the bedplate and connecting directly across render the steam-cylinder end, as a whole, susceptible to the varying changes of expansion and contraction arising from varying heats of the steam passing through, to, or from the cylinders.

The obj ect of my improvements is to overcome this troublesome feature; and the in-v vention consists in the arrangement and construction of the joint passages to or from the two cylinders within the bed-plate or forming part thereof, and leading from the cylinder-bolting faces in a direction curved as they move from the locality of said faces and uniting centrally to form a joint exhaust-nozzle for both cylinders, as hereinafter shown and described.

Referring now to the drawings, Figure l represents a plan vi ew showing the stean1-cylinder end of atwoecylinderbed-plate embodying my improvements with a section of steaincylinder passages shown in place and bolted thereto. Fig. 2 represents a sectional elevation of bed-plate and connectingepassages and an external view of two cylinders in place.

The letter A designates steam-cylinder end of bed-plate, and B the two cylinders bolted thereto. As a connection between the cylinder steampassages, the portions C of the cylinders are carried downward and are bolted movement of expansion due to heat passing through is in the direction defined bythe arrows e e, moving` the joint-nozzle F in that direction instead of having the effects of eX- pansion acting to spread the cylinder-bolting faces from each other and thereby throwing the cylinders out of line with the rest of the engine. The engine being adjusted and lined up while all parts are cold, the advantage of this curved control of the effects of expansion upon the adjustment of the engine is quite evident. The portion G, forming 'an end or cross-rib of the bed-plate, is kept free and clear from the heat effects due to the passage of steam to or from the cylinder, and acts as a tie between the cylinder-bolting faces D, and throws all the expansion effects upon the passages E to move the nozzle F in direction of the arrows. Of course the supply of live steam to the engines may pass in through j oint-nozzle F, or the exhaust from the engine may pass out.

H designates the chest-nozzle.

What I claim as new, and desire to secure by Letters Patent, is-

In a bed-plate for two-cylinder engines, a pair of passages leading from the cylinderbolting faces of. said bed-plate in a direction curved from said faces and uniting to form one central nozzle, in combination with a cross-rib of said bed-plate constructed and formed independent of and free from the temperature effects of said passages, as and for the purposes set forth.

MICHAEL HASTINGS.

Witnesses WM. H. WEIGHTMAN, MANUEL RODRIGUEZ. 

